Electret membrane, preparation method, refrigerator body assembly and refrigeration apparatus
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Solution Overview
Problem
Existing refrigeration technologies require costly energized electrodes and power supply systems to create an electrostatic field for food preservation, which increases costs and complexity.
Innovation Solution
An electret membrane with a metal electrode integrated on one side, capable of long-term electric charge storage, is used to create an electrostatic field without an external power source, incorporating a hydrophobic layer to prevent charge loss and rust, and is applied in refrigerator compartments to prolong food freshness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an energized electrode and power supply system are used to create an electrostatic field for food preservation, then the electrostatic field can be generated, but the cost and system complexity increase
Solution Approach 1:
The electret material is pre-charged during manufacturing to store electric charges permanently. This preliminary action eliminates the need for ongoing power supply and control systems, as the pre-charged electret membrane automatically generates the required electrostatic field when placed near food storage containers.
Solution Approach 2:
The electret membrane serves itself by maintaining its own electric charge without external intervention. The stored charges in the electret material continuously generate the electrostatic field needed for food preservation, eliminating dependence on external power sources and complex control systems.
2Reliability
If an energized electrode and power supply system are used to create an electrostatic field for food preservation, then the electrostatic field can be generated, but the cost increases
Solution Approach 1:
The electret material is pre-charged during manufacturing to store electric charges permanently. This preliminary action eliminates the need for ongoing power supply and control systems, as the pre-charged electret electret membrane automatically generates the required electrostatic field when placed near food storage containers.
Solution Approach 2:
The electret membrane serves itself by maintaining its own electric charge without external intervention. The stored charges in the electret material continuously generate the electrostatic field needed for food preservation, eliminating dependence on external power sources and complex control systems.
3Reliability
If a metal electrode is integrated on the electret material matrix, then the electrostatic field effectiveness is improved, but charge loss and rust may occur
Solution Approach 1:
The invention uses a composite structure combining electret material with a hydrophobic coating layer. This composite design allows the metal electrode to be protected from moisture and oxidation while maintaining electrical contact with the electret material, thus preventing rust and charge loss.
Solution Approach 2:
The hydrophobic coating acts as an intermediary layer between the metal electrode and the environment. This coating prevents direct contact between moisture/oxygen and the metal surface, thereby eliminating rust formation while allowing the electrode to function effectively.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The electret membrane effectively inhibits cellular metabolism in fruits and vegetables by disrupting ion transport and enzyme activity, providing a low-cost, reliable, and energy-efficient method for food preservation without the need for external power, thereby extending shelf life and simplifying the preservation process.
Implementation Method 1
an electret material matrix; a metal electrode, which is provided on one side of the matrix and attached to the electret material matrix
Implementation Method 2
the metal electrode is electrically polarized under the influence of the charges of the electret
Implementation Method 3
the electret membrane can form an electrostatic field in the storage unit
Implementation Method 4
incorporating a hydrophobic layer to prevent charge loss and rust
Data Source
AI summary
An electret membrane, a preparation method, a refrigerator body assembly, and a refrigeration apparatus. The electret membrane includes: an electret material matrix; and a metal electrode, which is arranged on one side of the electret material matrix and is attached to the electret material matrix. The electret membrane can be electrically polarized insofar as the electret membrane is not externally connected to a power source, and can form an electrostatic field; and when the electret membrane is applied to a fresh keeping function of apparatuses, such as a refrigerator, the fresh-keeping structure of the electrostatic field can be simplified, thereby reducing the costs for generating the electrostatic field, and facilitating the realization of low-cost and high-reliability electrostatic field fresh keeping for fresh-keeping apparatuses, such as the refrigerator.